I picked up a Crown 3 today and so far I am very impressed.
I fried the installed 0.25ohm coil immediately (hit fire by accident before filling) so no feedback on that particular coil

, but I really like the CIII 0.5ohm coil at 60-70w. I think the 0.5 will be a bit lighter on juice than the various TVF8 coils (mostly in the 0.15 range) that I have been running for almost a year in my CB, BBB and BB tanks.
The lack of a RBA bugs me but apparently the CIII coils last potentially 1-2 months so at a couple bucks each, I have no problem using factory coils.
No leaking or any issues so far but it's only been a day.
I ordered a bunch of 0.5ohm authentic coils from FT today as well as a pack of clone coils (worth a try for five bucks)
In any case, the CIII seems to be a solid tank and much better than the Crown 2 IMO. I also still use my original Crowns as I am one of the few that likes the RBA....